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carbon-lang/toolchain/check/testdata/interface/final.carbon
T
Jon Ross-Perkins 93a8c5230c Ensure a symbolic final impl has a definition produced (#6236) 
Right now, the impl lookup can both fail to resolve the specific
definition because it's symbolic, and return a "final" constant because
it's a `final impl`. This is adding an instruction to help ensure the
specific is resolved.

The constant evaluation is fully recursive, but I'm not adding a TODO
since that's a known issue with impl lookup in general.
2025-11-25 18:59:25 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interface/final.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/final.carbon
// --- require_complete_impl.carbon
//@include-in-dumps
library "[[@TEST_NAME]]";
interface I { fn F(); }
interface J {}
final impl forall [T:! J] T as I { fn F() {} }
// This is creating an indirection where the `final impl` requires an indirect
// instantiation by the caller.
fn UseI(T:! I) { T.F(); }
fn UseJ(T:! J) { UseI(T); }
class C {}
impl C as J {}
fn Use() { UseJ(C); }
// CHECK:STDOUT: --- require_complete_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self.9f2: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %I.F.type: type = fn_type @I.F [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %I.F: %I.F.type = struct_value () [concrete]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.%I.F.decl [concrete]
// CHECK:STDOUT: %J.type: type = facet_type <@J> [concrete]
// CHECK:STDOUT: %Self.dc6: %J.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %T.dc6: %J.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.84b: type = pattern_type %J.type [concrete]
// CHECK:STDOUT: %T.binding.as_type.1fa: type = symbolic_binding_type T, 0, %T.dc6 [symbolic]
// CHECK:STDOUT: %I.impl_witness.2d8: <witness> = impl_witness file.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.dc6) [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type.0a0: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%T.dc6) [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.793: %T.binding.as_type.as.I.impl.F.type.0a0 = struct_value () [symbolic]
// CHECK:STDOUT: %I.facet.238: %I.type = facet_value %T.binding.as_type.1fa, (%I.impl_witness.2d8) [symbolic]
// CHECK:STDOUT: %T.9f2: %I.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.09a: type = pattern_type %I.type [concrete]
// CHECK:STDOUT: %UseI.type: type = fn_type @UseI [concrete]
// CHECK:STDOUT: %UseI: %UseI.type = struct_value () [concrete]
// CHECK:STDOUT: %T.binding.as_type.bcb: type = symbolic_binding_type T, 0, %T.9f2 [symbolic]
// CHECK:STDOUT: %I.lookup_impl_witness: <witness> = lookup_impl_witness %T.9f2, @I [symbolic]
// CHECK:STDOUT: %.258: type = fn_type_with_self_type %I.F.type, %T.9f2 [symbolic]
// CHECK:STDOUT: %impl.elem0: %.258 = impl_witness_access %I.lookup_impl_witness, element0 [symbolic]
// CHECK:STDOUT: %specific_impl_fn: <specific function> = specific_impl_function %impl.elem0, @I.F(%T.9f2) [symbolic]
// CHECK:STDOUT: %UseJ.type: type = fn_type @UseJ [concrete]
// CHECK:STDOUT: %UseJ: %UseJ.type = struct_value () [concrete]
// CHECK:STDOUT: %.f34: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%T.dc6) [symbolic]
// CHECK:STDOUT: %UseI.specific_fn.6e9: <specific function> = specific_function %UseI, @UseI(%I.facet.238) [symbolic]
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %J.impl_witness: <witness> = impl_witness file.%J.impl_witness_table [concrete]
// CHECK:STDOUT: %Use.type: type = fn_type @Use [concrete]
// CHECK:STDOUT: %Use: %Use.type = struct_value () [concrete]
// CHECK:STDOUT: %J.facet: %J.type = facet_value %C, (%J.impl_witness) [concrete]
// CHECK:STDOUT: %UseJ.specific_fn: <specific function> = specific_function %UseJ, @UseJ(%J.facet) [concrete]
// CHECK:STDOUT: %.1ec: type = fn_type_with_self_type %I.F.type, %I.facet.238 [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.specific_fn.4f0: <specific function> = specific_function %T.binding.as_type.as.I.impl.F.793, @T.binding.as_type.as.I.impl.F(%T.dc6) [symbolic]
// CHECK:STDOUT: %I.impl_witness.2d2: <witness> = impl_witness file.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type.4e6: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.1e2: %T.binding.as_type.as.I.impl.F.type.4e6 = struct_value () [concrete]
// CHECK:STDOUT: %.12b: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %I.facet.8a0: %I.type = facet_value %C, (%I.impl_witness.2d2) [concrete]
// CHECK:STDOUT: %UseI.specific_fn.aab: <specific function> = specific_function %UseI, @UseI(%I.facet.8a0) [concrete]
// CHECK:STDOUT: %.df0: type = fn_type_with_self_type %I.F.type, %I.facet.8a0 [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.specific_fn.662: <specific function> = specific_function %T.binding.as_type.as.I.impl.F.1e2, @T.binding.as_type.as.I.impl.F(%J.facet) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: .J = %J.decl
// CHECK:STDOUT: .UseI = %UseI.decl
// CHECK:STDOUT: .UseJ = %UseJ.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .Use = %Use.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: %J.decl: type = interface_decl @J [concrete = constants.%J.type] {} {}
// CHECK:STDOUT: impl_decl @T.binding.as_type.as.I.impl [concrete] {
// CHECK:STDOUT: %T.patt: %pattern_type.84b = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %T.ref: %J.type = name_ref T, %T.loc7_20.2 [symbolic = %T.loc7_20.1 (constants.%T.dc6)]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.1fa)]
// CHECK:STDOUT: %.loc7_27: type = converted %T.ref, %T.as_type [symbolic = %T.binding.as_type (constants.%T.binding.as_type.1fa)]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: %.loc7_24: type = splice_block %J.ref [concrete = constants.%J.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc7_20.2: %J.type = symbolic_binding T, 0 [symbolic = %T.loc7_20.1 (constants.%T.dc6)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.impl_witness_table = impl_witness_table (@T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F.decl), @T.binding.as_type.as.I.impl [concrete]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness %I.impl_witness_table, @T.binding.as_type.as.I.impl(constants.%T.dc6) [symbolic = @T.binding.as_type.as.I.impl.%I.impl_witness (constants.%I.impl_witness.2d8)]
// CHECK:STDOUT: %UseI.decl: %UseI.type = fn_decl @UseI [concrete = constants.%UseI] {
// CHECK:STDOUT: %T.patt: %pattern_type.09a = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc11_13: type = splice_block %I.ref [concrete = constants.%I.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc11_9.2: %I.type = symbolic_binding T, 0 [symbolic = %T.loc11_9.1 (constants.%T.9f2)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %UseJ.decl: %UseJ.type = fn_decl @UseJ [concrete = constants.%UseJ] {
// CHECK:STDOUT: %T.patt: %pattern_type.84b = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc12_13: type = splice_block %J.ref [concrete = constants.%J.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc12_9.2: %J.type = symbolic_binding T, 0 [symbolic = %T.loc12_9.1 (constants.%T.dc6)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @C.as.J.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %J.impl_witness_table = impl_witness_table (), @C.as.J.impl [concrete]
// CHECK:STDOUT: %J.impl_witness: <witness> = impl_witness %J.impl_witness_table [concrete = constants.%J.impl_witness]
// CHECK:STDOUT: %Use.decl: %Use.type = fn_decl @Use [concrete = constants.%Use] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self.9f2]
// CHECK:STDOUT: %I.F.decl: %I.F.type = fn_decl @I.F [concrete = constants.%I.F] {} {}
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, %I.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = %assoc0
// CHECK:STDOUT: witness = (%I.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J {
// CHECK:STDOUT: %Self: %J.type = symbolic_binding Self, 0 [symbolic = constants.%Self.dc6]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic impl @T.binding.as_type.as.I.impl(%T.loc7_20.2: %J.type) {
// CHECK:STDOUT: %T.loc7_20.1: %J.type = symbolic_binding T, 0 [symbolic = %T.loc7_20.1 (constants.%T.dc6)]
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc7_20.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.1fa)]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness file.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.loc7_20.1) [symbolic = %I.impl_witness (constants.%I.impl_witness.2d8)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%T.loc7_20.1) [symbolic = %T.binding.as_type.as.I.impl.F.type (constants.%T.binding.as_type.as.I.impl.F.type.0a0)]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F: @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F.type (%T.binding.as_type.as.I.impl.F.type.0a0) = struct_value () [symbolic = %T.binding.as_type.as.I.impl.F (constants.%T.binding.as_type.as.I.impl.F.793)]
// CHECK:STDOUT:
// CHECK:STDOUT: impl: %.loc7_27 as %I.ref {
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.decl: @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F.type (%T.binding.as_type.as.I.impl.F.type.0a0) = fn_decl @T.binding.as_type.as.I.impl.F [symbolic = @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F (constants.%T.binding.as_type.as.I.impl.F.793)] {} {}
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .F = %T.binding.as_type.as.I.impl.F.decl
// CHECK:STDOUT: witness = file.%I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.J.impl: %C.ref as %J.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = file.%J.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @I.F(@I.%Self: %I.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @T.binding.as_type.as.I.impl.F(@T.binding.as_type.as.I.impl.%T.loc7_20.2: %J.type) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @UseI(%T.loc11_9.2: %I.type) {
// CHECK:STDOUT: %T.loc11_9.1: %I.type = symbolic_binding T, 0 [symbolic = %T.loc11_9.1 (constants.%T.9f2)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc11_9.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.bcb)]
// CHECK:STDOUT: %I.lookup_impl_witness: <witness> = lookup_impl_witness %T.loc11_9.1, @I [symbolic = %I.lookup_impl_witness (constants.%I.lookup_impl_witness)]
// CHECK:STDOUT: %.loc11_19.2: type = fn_type_with_self_type constants.%I.F.type, %T.loc11_9.1 [symbolic = %.loc11_19.2 (constants.%.258)]
// CHECK:STDOUT: %impl.elem0.loc11_19.2: @UseI.%.loc11_19.2 (%.258) = impl_witness_access %I.lookup_impl_witness, element0 [symbolic = %impl.elem0.loc11_19.2 (constants.%impl.elem0)]
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2: <specific function> = specific_impl_function %impl.elem0.loc11_19.2, @I.F(%T.loc11_9.1) [symbolic = %specific_impl_fn.loc11_19.2 (constants.%specific_impl_fn)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %T.ref: %I.type = name_ref T, %T.loc11_9.2 [symbolic = %T.loc11_9.1 (constants.%T.9f2)]
// CHECK:STDOUT: %F.ref: %I.assoc_type = name_ref F, @I.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.bcb)]
// CHECK:STDOUT: %.loc11_19.1: type = converted %T.ref, %T.as_type [symbolic = %T.binding.as_type (constants.%T.binding.as_type.bcb)]
// CHECK:STDOUT: %impl.elem0.loc11_19.1: @UseI.%.loc11_19.2 (%.258) = impl_witness_access constants.%I.lookup_impl_witness, element0 [symbolic = %impl.elem0.loc11_19.2 (constants.%impl.elem0)]
// CHECK:STDOUT: %specific_impl_fn.loc11_19.1: <specific function> = specific_impl_function %impl.elem0.loc11_19.1, @I.F(constants.%T.9f2) [symbolic = %specific_impl_fn.loc11_19.2 (constants.%specific_impl_fn)]
// CHECK:STDOUT: %.loc11_22: init %empty_tuple.type = call %specific_impl_fn.loc11_19.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @UseJ(%T.loc12_9.2: %J.type) {
// CHECK:STDOUT: %T.loc12_9.1: %J.type = symbolic_binding T, 0 [symbolic = %T.loc12_9.1 (constants.%T.dc6)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc12_9.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.1fa)]
// CHECK:STDOUT: %.loc12_24.2: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%T.loc12_9.1) [symbolic = %.loc12_24.2 (constants.%.f34)]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness file.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.loc12_9.1) [symbolic = %I.impl_witness (constants.%I.impl_witness.2d8)]
// CHECK:STDOUT: %I.facet.loc12_24.2: %I.type = facet_value %T.binding.as_type, (%I.impl_witness) [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.238)]
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.2: <specific function> = specific_function constants.%UseI, @UseI(%I.facet.loc12_24.2) [symbolic = %UseI.specific_fn.loc12_18.2 (constants.%UseI.specific_fn.6e9)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %UseI.ref: %UseI.type = name_ref UseI, file.%UseI.decl [concrete = constants.%UseI]
// CHECK:STDOUT: %T.ref: %J.type = name_ref T, %T.loc12_9.2 [symbolic = %T.loc12_9.1 (constants.%T.dc6)]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.1fa)]
// CHECK:STDOUT: %I.facet.loc12_24.1: %I.type = facet_value %T.as_type, (constants.%I.impl_witness.2d8) [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.238)]
// CHECK:STDOUT: %.loc12_24.1: %I.type = converted %T.ref, %I.facet.loc12_24.1 [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.238)]
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.1: <specific function> = specific_function %UseI.ref, @UseI(constants.%I.facet.238) [symbolic = %UseI.specific_fn.loc12_18.2 (constants.%UseI.specific_fn.6e9)]
// CHECK:STDOUT: %UseI.call: init %empty_tuple.type = call %UseI.specific_fn.loc12_18.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %UseJ.ref: %UseJ.type = name_ref UseJ, file.%UseJ.decl [concrete = constants.%UseJ]
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.facet: %J.type = facet_value %C.ref, (constants.%J.impl_witness) [concrete = constants.%J.facet]
// CHECK:STDOUT: %.loc16: %J.type = converted %C.ref, %J.facet [concrete = constants.%J.facet]
// CHECK:STDOUT: %UseJ.specific_fn: <specific function> = specific_function %UseJ.ref, @UseJ(constants.%J.facet) [concrete = constants.%UseJ.specific_fn]
// CHECK:STDOUT: %UseJ.call: init %empty_tuple.type = call %UseJ.specific_fn()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%Self.9f2) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl(constants.%T.dc6) {
// CHECK:STDOUT: %T.loc7_20.1 => constants.%T.dc6
// CHECK:STDOUT: %T.binding.as_type => constants.%T.binding.as_type.1fa
// CHECK:STDOUT: %I.impl_witness => constants.%I.impl_witness.2d8
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type => constants.%T.binding.as_type.as.I.impl.F.type.0a0
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F => constants.%T.binding.as_type.as.I.impl.F.793
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl.F(constants.%T.dc6) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%I.facet.238) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%T.9f2) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%T.9f2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%T.9f2) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseJ(constants.%T.dc6) {
// CHECK:STDOUT: %T.loc12_9.1 => constants.%T.dc6
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%I.facet.238) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%I.facet.238
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%T.binding.as_type.1fa
// CHECK:STDOUT: %I.lookup_impl_witness => constants.%I.impl_witness.2d8
// CHECK:STDOUT: %.loc11_19.2 => constants.%.1ec
// CHECK:STDOUT: %impl.elem0.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.793
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.specific_fn.4f0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseJ(constants.%J.facet) {
// CHECK:STDOUT: %T.loc12_9.1 => constants.%J.facet
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %.loc12_24.2 => constants.%.12b
// CHECK:STDOUT: %I.impl_witness => constants.%I.impl_witness.2d2
// CHECK:STDOUT: %I.facet.loc12_24.2 => constants.%I.facet.8a0
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.2 => constants.%UseI.specific_fn.aab
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl(constants.%J.facet) {
// CHECK:STDOUT: %T.loc7_20.1 => constants.%J.facet
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %I.impl_witness => constants.%I.impl_witness.2d2
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type => constants.%T.binding.as_type.as.I.impl.F.type.4e6
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F => constants.%T.binding.as_type.as.I.impl.F.1e2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%I.facet.8a0) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%I.facet.8a0
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %I.lookup_impl_witness => constants.%I.impl_witness.2d2
// CHECK:STDOUT: %.loc11_19.2 => constants.%.df0
// CHECK:STDOUT: %impl.elem0.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.1e2
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.specific_fn.662
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%I.facet.8a0) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl.F(constants.%J.facet) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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